ASME B16.47 Class 900 Series A Blind Flanges
| Nominal Pipe Size | Outside Diameter (O) | Minimum Thickness (T) | Raised Face Diameter (R) | Approximate Weight | Bolt Circle (C) | Number of Holes | Diameter of Holes |
|---|---|---|---|---|---|---|---|
| 26 | 42.75 mm | 6.31 mm | 29.50 mm | 2565 lb | 37.50 mm | 20 | 2.88 mm |
| 28 | 46.00 mm | 6.75 mm | 31.50 mm | 3178 lb | 40.25 mm | 20 | 3.12 mm |
| 30 | 48.50 mm | 7.18 mm | 33.75 mm | 3759 lb | 42.75 mm | 20 | 3.12 mm |
| 32 | 51.75 mm | 7.62 mm | 36.00 mm | 4541 lb | 45.50 mm | 20 | 3.38 mm |
| 34 | 55.00 mm | 8.06 mm | 38.00 mm | 5425 lb | 48.25 mm | 20 | 3.62 mm |
| 36 | 57.50 mm | 8.44 mm | 40.25 mm | 6210 lb | 50.75 mm | 20 | 3.62 mm |
| 38 | 57.50 mm | 8.50 mm | 43.25 mm | 6253 lb | 50.75 mm | 20 | 3.62 mm |
| 40 | 59.50 mm | 8.81 mm | 45.75 mm | 6940 lb | 52.75 mm | 24 | 3.62 mm |
| 42 | 61.50 mm | 9.12 mm | 47.75 mm | 7675 lb | 54.75 mm | 24 | 3.62 mm |
| 44 | 64.88 mm | 9.56 mm | 50.00 mm | 8955 lb | 57.62 mm | 24 | 3.88 mm |
| 46 | 68.25 mm | 10.06 mm | 52.50 mm | 10,426 lb | 60.50 mm | 24 | 4.12 mm |
| 48 | 70.25 mm | 10.38 mm | 54.50 mm | 11,398 lb | 62.50 mm | 24 | 4.12 mm |